C'mon witch, they're not *that* simple!
I worked the tills as a lad (which made me determined to pass my A-levels!). The aptitude test was comical, along the lines of 'circle the biggest of the following numbers'. Expected to get a lollipop when I finished...
If anyone's having trouble with aptitude tests, there must be books on the market. Several mates did GMATs recently as a prelude to business school. They had large books of sample questions and the practice served them well.